POLYBENZIMIDAZOLE-BASED MEMBRANES FOR THE DEHYDRATION OF ORGANIC LIQUIDS VIA PERVAPORATION
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United States of America Patent
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Issued Date -
Nov 3, 2011
app pub date -
Apr 22, 2011
filing date -
Apr 29, 2010
priority date (Note) -
Abandoned
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Abstract
A hollow fiber membrane has an outer layer of polybenzimidazole (PBI) and an inner support layer, e.g., polyetherimide (PEI). The hollow fiber membrane is made by a co-extrusion (spinning) process. The hollow fiber membrane may be used in a pervaporation process, such as a pervaporation dehydration of an organic liquid, e.g., ethylene glycol (EG). A contactor is made with the hollow fiber membrane.
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